| US 7,364,804 B2 | ||
| Pyran derivative, method for manufacturing the same, and light-emitting element containing the pyran derivative | ||
| Sachiko Yamagata, Kanagawa (Japan); Ryoji Nomura, Kanagawa (Japan); and Satoshi Seo, Kanagawa (Japan) | ||
| Assigned to Semiconductor Energy Laboratory Co., Ltd., (Japan) | ||
| Filed on Aug. 13, 2004, as Appl. No. 10/917,668. | ||
| Claims priority of application No. 2003-305664 (JP), filed on Aug. 29, 2003. | ||
| Prior Publication US 2005/0048315 A1, Mar. 03, 2005 | ||
| Int. Cl. H05B 33/14 (2006.01); C07D 309/34 (2006.01) | ||
| U.S. Cl. 428—690 [428/917; 544/38; 544/101; 546/99; 548/440; 549/426] | 20 Claims |
1. A pyran derivative represented by general formula 1:
 wherein A1 and A2 are individually an aromatic ring, and at least one of A1 and A2 is represented by general formula 1-1,
 wherein X1 is a dialkylamino group; and Y1 is a diarylamino group or an alkylarylamino group.
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